葛洲坝水利枢纽位于长江三峡下口南津关下游2.3公里处,下距宜昌市6公里。长江东流出南津关后急转向南,江面由300米骤然展宽至1600米,在坝址河段内被葛洲坝和西坝分为大江、二江、三江,主流在大江。到坝区下端镇川门,大、二、、三江又复汇合,江面宽约750米,长江又转向东流。(请参见本刊81年1期 Gezhouba Dam is located in the lower reaches of the Three Gorges of the Yangtze River downstream 2.3 kilometers, 6 kilometers away from Yichang City. After the Yangtze River flowed southward from Nanjin Pass, it turned sharply southward. The surface of the river suddenly widened from 300 meters to 1,600 meters. It was divided into two major rivers, two rivers and three rivers by Gezhouba and Xiba in the dam section of the river. Jinchuan to the bottom of the dam area, large, two, three rivers and complex convergence, the river is about 750 meters wide, the Yangtze River has turned eastward. (See the first issue of this issue 81 years